tekmar 263 Boiler Control - Manual (Page 19)

19 of 36 © 2009 D 263 - 03/09
STEP FOUR ELECTRICAL CONNECTIONS TO THE CONTROL
General
The installer should test to confirm that no voltage is present at any of the wires. Push the control into the base and slide it down
until it snaps firmly into place.
Powered Input Connections
115 V (ac) Power
Connect the 115 V (ac) power supply to the Power L and Power N terminals (7 and 8).
This connection provides power to the microprocessor and display of the control.
As well, this connection provides power to the Prim P1 terminal (6) from the Power L
terminal (7).
Boiler Demand
To generate a Boiler Demand, a voltage between 24 V (ac) and 230 V (ac) must be
applied across the Boiler Demand terminals (1 and 2).
DHW Demand
To generate a DHW Demand, a voltage between 24 V (ac) and 230 V (ac) must be
applied across the DHW Dem and Com Dem terminals (3 and 4).
Caution: The same power supply must be used to power both the DHW Demand and
the Setpoint Demand circuits since they both share the Com Dem terminal.
Setpoint Demand
To generate a Setpoint Demand, a voltage between 24 V (ac) and 230 V (ac) must be
applied across the Setp Dem and Com Dem terminals (5 and 4).
Caution: The same power supply must be used to power both the DHW Demand and
the Setpoint Demand circuits since they both share the Com Dem terminal.
Output Connections
Primary Pump Contact (Prim P1)
The Prim P1 output terminal (6) is a powered output. When the relay in the control
closes, 115 V (ac) is provided to the Prim P1 terminal (6) from the Power L terminal (7).
To operate the primary pump, connect one side of the primary pump circuit to terminal 6
and the second side of the pump circuit to the neutral (Power N) side of the 115 V (ac)
power supply.
DHW Pmp / Vlv Contact
The DHW Pmp / Vlv terminals (9 and 10) are an isolated output. There is no power
available on these terminals from the control. These terminals are to be used as a
switch to either make or break power to the DHW pump or the DHW valve. Since this
is an isolated contact, it may switch a voltage between 24 V (ac) and 230 V (ac).
7 8
115 V (ac)
L
N
Power
L N
1 2
Boiler
Demand
24 to 230 V (ac)
N
L
3 4
DHW
Dem
Com
Dem
24 to 230 V (ac)
N
L
4 5
Com
Dem
Setp
Dem
24 to 230 V (ac)
L
N
L
115 V (dc)
N
Prim
P1
Power
L
8
N
6 7
9 10
M
24 to 230 V (ac)
DHW
Pmp/Vlv
or
N
L